Definition of dorsum in US English:


nounPlural dorsa

Zoology Anatomy
  • The dorsal part of an organism or structure.

    • ‘Within 48 hours she developed well demarcated erythema over the front of her legs, and large blisters over each knee and the dorsum of her feet.’
    • ‘Toothbrushing lasted for approximately five minutes after each meal and included brushing the teeth, the dorsum of the tongue, and the palatal and mandibular mucosa.’
    • ‘It is the only muscle on the dorsum of the foot.’
    • ‘The anterior tibial may become plexiform on the dorsum of the foot, giving rise to the dorsal intermetatarsals.’
    • ‘A tooth typically penetrates the dorsum of the hand over the third MCP joint.’
    backbone, spinal column, vertebral column, vertebrae
    View synonyms


Late 18th century (denoting a long hill or ridge): from Latin, ‘back’.